Vulnerability Description
Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go, including support for JSON Web Encryption (JWE), JSON Web Signature (JWS), and JSON Web Token (JWT) standards. Prior to 4.1.6, go-jose parses attacker-controlled RSA modulus and prime values from JWKs without enforcing size and consistency bounds before passing them to crypto/rsa.PrivateKey.Validate. On Go 1.24 and later, crafted large or degenerate RSA parameters can make that validation consume cubic CPU time, allowing remote denial of service in applications that parse JWKs from untrusted sources. This issue is fixed in version 4.1.6.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/go-jose/go-jose/commit/a0111f82742fa92bceec9ede40845e73319e62
- https://github.com/go-jose/go-jose/releases/tag/v4.1.6
- https://github.com/go-jose/go-jose/security/advisories/GHSA-mgcc-cww5-fp2q
FAQ
What is CVE-2026-116587?
CVE-2026-116587 is a vulnerability with a CVSS score of 7.5 (HIGH). Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go, including support for JSON Web Encryption (JWE), JSON Web Signature (JWS), and JSON Web Token...
How severe is CVE-2026-116587?
CVE-2026-116587 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-116587?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.